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Re: [Libvir] [PATCH] Check the version of Xen in xenDaemonAttachDevice()



On Thu, Aug 16, 2007 at 09:27:04AM -0400, Daniel Veillard wrote:
> On Thu, Aug 16, 2007 at 05:41:47PM +0900, Masayuki Sunou wrote:
> > Hi
> > 
> > When virsh attach-disk/attach-interface is executed in < Xen 3.0.4,
> > the OS type of domain is NULL in xenDaemonAttachDevice().
> > As a result, the command becomes segmentation fault.
> > 
> > This patch fixes it by checking the version of Xen in xenDaemonAttachDevice().
> > 
> > Signed-off-by: Masayuki Sunou <fj1826dm aa jp fujitsu com>
> [...]
> >  
> > +    if (domain->id < 0 && priv->xendConfigVersion < 3)
> > +        return(-1);
> > +
> >      str = virDomainGetOSType(domain);
> >      if (strcmp(str, "linux"))
> >          hvm = 1;
> 
>   I do not understand the patch. Why is that dependant on domain->id < 0 ?
> Can you explain the logic there ?

That just ensures that this command fails in a sensible way with inactive
guests when run on older XenD without the inactive domain management APIs.


Dan.
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